Stack With Node

stack_with_node.py

class Node(object):
    def __init__(self, value=None,pointer=None):
        self.value=value
        self.pointer=pointer
        
class Stack(object):
    def __init__(self):
        self.head=None
        self.count=0
        
    def isEmpty(self):
        return not bool(self.head)
    
    def push(self,item):
        self.head=Node(item,self.head)
        self.count +=1
        
    def pop(self):
        if self.count >0 and self.head:
            node=self.head
            self.head=node.pointer
            self.count -=1
            return node.value
        else:
            print("Stack is Empty")
            
    def peek(self):
        if self.count >0 and self.head:
            return self.head.value
        else:
            print("Stack is empty")
            
    def size(self):
        return self.count
    
    def _printList(self):
        node=self.head
        while node:
            print(node.value,end="")
            node=node.pointer
        print()